+15
+10
+5
0
–5
–10

LEVEL

MIC

1

SET

U

 

CHANNEL STRIP FEATURES

MIN-20dB

+30dB +50

 

GAIN

LOW CUT

 

 

75 Hz

 

 

 

U

 

EQ

 

 

 

HI

 

 

 

12k

-15

+15

 

 

 

U

 

 

 

 

 

LOW

 

 

 

80Hz

-15

+15

 

 

 

 

 

AUX

 

 

 

1

 

 

U MON

OO

+6

 

 

 

 

U

2

 

 

 

EFX

OO

+6

 

 

LPAN R

1 MUTE

dB

10

OL

5

U

5

10

20

OVERVIEW

The channel strips are independent of each other, and allow you to adjust, tweak and otherwise beautify the sound coming from your different microphones, guitars and other in- struments. The Faders and Pans let you adjust how much of each channel is sent to the main mix. The Auxes let you adjust how much of each channel goes to your stage monitors or out to external or internal effects.

The channel strips come in two flavors: Mono and Stereo. In addition, the DFX•12 has two line-level-only stereo channels.

16. GAIN

If you haven’t already, please read “SET THE LEVELS” on page 5.

The GAIN control adjusts the input sensitivity of the mic and line inputs on each channel. This allows signals from the outside world to be adjusted to optimal internal operating levels.

Through the mono channel MIC (XLR) in- puts, there is 50 dB of gain fully up. For stereo channel MIC inputs, this is +40 dB.

Through the mono channel LINE IN (TRS) inputs, there is 20 dB of attenuation fully down and +30 dB of gain fully up, with a “U” (unity gain) mark halfway up. The stereo channel LINE INs have a maximum gain of +20 dB.

Having 20 dB of line-level attenuation can be very handy when you are injecting a signal that is very hot, or when you want to add a lot of EQ boost, or both. Without this “pad,” it would be very difficult to control the line signal and might lead to channel clipping.

17. LEVEL SET LED

This LED (Light Emitting Dohickey) lets you know that the signals going into the mixer are adjusted to the correct level, not too strong

18. LOW CUT

The LOW CUT circuit, often referred to as a high-pass filter, cuts the bass frequencies below 75 Hz at a rate of 18 dB per octave.

We recommend that you use LOW CUT on every microphone application except kick drum, bass guitar, or bass-heavy synth patches. LOW CUT can also help reduce the possibility of feedback in live situations and it helps to conserve amplifier power.

2-BAND CHANNEL EQ

The DFX Mixers use “shelving” equalization. This boosts or cuts all frequencies past a specified frequency. For example, turning the LOW EQ (20) knob clockwise will boost the bass frequencies at 80 Hz and below.

Although you can bring sound to life with proper EQ, you can also mess things up. If you max the EQs on every channel, you’ll get mix mush, not to mention driving your mix levels near or beyond clipping. So equalize subtly; use cut as well as boost.

Adjusting the channel EQ will affect your main mix and the AUX 2/EFX (8) output, but not the AUX 1/MON (7) output.

19. HI EQ

This control provides up to

+15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15 dB of boost, or 15 dB of cut

+10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

at 12 kHz and above. There is

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HI

–5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

no boost or cut at the center

–10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

–15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

detent position.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20Hz100Hz

 

 

 

 

1kHz

 

 

 

 

10kHz 20kHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Use this wisely to add sizzle to cymbals or an overall sense of transparency or edge to keyboards, vocals, guitar, and bacon frying. Turn it down a little to reduce sibilance or hide tape hiss.

20. LOW EQ

30

40

50

60

OO

Mono Channel

12

to cause distortion and not too weak to be lost in noise.

After you connect a microphone or line-

level component to the mixer, do a sound test and adjust the GAIN (16) control until this handy LED flickers just occasionally. If it is glowing constantly, turn the GAIN down. If the LED is doing almost nothing, turn it up.

This control provides up to 15 dB of boost, or 15 dB of cut at 80 Hz and below. There is no boost or cut at

–15

the center detent position. 20Hz100Hz1kHz Frequencies of 80 Hz and

below represents the punch in bass drums, bass guitar, fat synth patches, and high-testosterone male singers.

While adding boost, also engaging the LOW CUT (18) switch can create an audible low frequency boost without boosting stage rumble, mic-handling clunks, and breath pops.

LOW

10kHz 20kHz